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water mark". The ordinary high water mark is established by physical characteristics such as a natural water line impressed on the bank, presence of shelves, destruction of terrestrial vegetation, or the presence of litter and debris. Jurisdictional wetlands are vegetated areas that meet specific vegetation, soil, and hydrologic criteria defined by the ACOE Wetlands Delineation Manual and Regional Supplement (ACOE, 1987; 2008). Jurisdictional wetlands are usually adjacent to or hydrologically associated with Waters of the U.S. Isolated wetlands are outside federal jurisdiction, but may be regulated by RWQCB under the State Wetlands Program. The only potentially jurisdictional Water of the U.S or wetland in the project site is Duck Creek, which flows through the site. The section of Duck Creek in the site is trapezoidal in shape with a mean width of 25 feet. The potential jurisdictional limit of Duck Creek is defined by an ordinary high water mark (OHWM). The creek flows east to west and conveys water from season storms, as well as agricultural tail water much of the year. Emergent wetland vegetation in the portion of Duck Creek within the site boundary is limited (see photographs in Attachment C). In contrast, the section of the creek adjacent to the south edge of the side supports a notable stand of tules and cattails. Duck Creek is depicted as a "blue -line" stream on the USGS topographic map (Figure 2) and as a Riverine feature on the National Wetland Inventory (NWI) map (Attachment D). Duck Creek is tributary to the San Joaquin River and the San Joaquin River is a navigable jurisdictional water of the U.S. The tributary relationship of Duck Creek to the San Joaquin River forms the basis for it being potentially jurisdictional Waters of the U.S. and under the jurisdiction of agencies including ACOE, CDFW, and the RWQCB. Duck Creek also falls under the jurisdiction of the CVFPB. The project will involve no work in Duck Creek. SPECIAL -STATUS SPECIES: Special -status species are plants and animals that are legally protected under the state and/or federal Endangered Species Act or other 3009 Pock Lane: Biology 11 November 24, 2021